User’s Manual G-2
Legal Footnotes
■use of computer at temperatures outside the range of 5°C to 30°C (41°F
to 86°F) or >25°C (77°F) at high altitude (all temperature references are
approximate and may vary depending on the specific computer model -
please refer to your computer documentation or visit the Toshiba
website at www.pcsupport.toshiba.com for details).
CPU performance may also vary from specifications due to design
configuration.
Under some conditions, your computer product may automatically shut-
down. This is a normal protective feature designed to reduce the risk of lost
data or damage to the product when used outside recommended
conditions. To avoid risk of lost data, always make back-up copies of data
by periodically storing it on an external storage medium. For optimum
performance, use your computer product only under recommended
conditions. Read additional restrictions in your product documentation.
Contact Toshiba technical service and support, refer to TOSHIBA support
section in Chapter 8 Troubleshooting for more information.

64-Bit Computing

64-bit processors are designed to take advantage of 32 and 64 bit
computing.
64-bit computing requires that the following hardware and software
requirements are met:
■64-bit Operating System
■64-bit CPU, Chipset and BIOS (Basic Input/Output System)
■64-bit Device drivers
■64-bit applications
Certain device drivers and/or applications may not be compatible with a 64-
bit CPU and therefore may not function properly.

Memory (Main System)

Part of the main system memory may be used by the graphics system for
graphics performance and therefore reduce the amount of main system
memory available for other computing activities. The amount of main
system memory allocated to support graphics may vary depending on the
graphics system, applications utilized, system memory size and other
factors.
Computers configured with a 32-bit operating system can address up to
approximately 3 GB of system memory.
Computers configured with a 64-bit operating system can address 4 GB or
more of system memory.